We consider an N duplicate-server system, where each server consists of two reconfigurable duplicated units which are subject to breakdowns. This system is studied analytically using generating functions, and also numerically using the matrix-geometric procedure. Using the generating function approach we obtain a recursive expression of the queuelength distribution for N=1. This expression in difficult to generalize to N>1. The numerical method is applicable for any value of N. For any N, we also obtain the condition for stability and the availability of the system.sp;       (크리깅응용, 시계열해석, 대수성시험, 추적자시험) ========================================================================== ■  주 관 : (사)한국지하수토양환경학회 ■  후 원 : 농업기반공사 ■  일 시 : 2005년 8월 22일(월) ~ 26일(금) ■  장 소 : 농업기반공사 교육원(전산실) ※ 자세한 사항은 (사)한국지하수토양환경학회 홈페이지 ( http://www.kossge.or.kr ) 을 참조하십시오.??